Marphisa

(in Orlando Furioso). Sister of Rogero, and a female
knight of amazing prowess. She was brought up by a magician, but, being
stolen at the age of seven, was sold to the king of Persia. The king
assailed her virtue when she was eighteen, but she slew him, and seized
the crown. She came to Gaul to join the army of Agramant, but hearing
that Agramant's father had murdered her mother Galacella, she entered
the camp of Charlemagne, and was baptised.